Confined Space Detector rau Kev Ntsuas Roj Teeb Meem
Kev kuaj pom cov pa phem hauv qhov chaw kaw yuav tsum tau lub tshuab ntes nkag mus rau qhov kev tshawb pom ua ntej. Nws yog ib qho tsim nyog yuav tsum tau kuaj xyuas qhov muaj pes tsawg leeg ntawm cov pa phem hauv qhov chaw kaw ua ntej cov neeg ua haujlwm nkag mus. Kev kuaj xyuas yog ua raws li hauv qab no:
(1) Kev lees paub Oxygen, kuaj xyuas cov qib oxygen tam sim no;
(2) Kev lees paub ntawm cov pa hluav taws xob hluav taws xob, kev tshawb nrhiav cov kev hloov pauv hauv cov pa taws hluav taws xob;
(3) Kev lees paub cov pa phem, txhawm rau txheeb xyuas seb qhov concentration ntawm cov pa roj carbon monoxide tsawg dua li qhov tso cai raug txwv PEL tau teev tseg los ntawm OSHA. Cov pa roj carbon monoxide ib txwm nyob hauv qhov chaw kaw yog hydrogen sulfide, carbon monoxide, thiab lwm yam tshuaj lom neeg tsis nyob hauv lawv. RAE's detectors tuaj yeem ntes tau ib qho roj lossis sib xyaw ntawm cov pa roj lom tib lub sijhawm.
Nws yog ib qho tseem ceeb heev uas yuav tsum tau coj mus kuaj rau saum, nruab nrab, thiab hauv qab ntawm qhov chaw kaw kom pom qhov concentration ntawm ntau yam roj los yog vapors. Qee cov pa roj carbon monoxide yog sib zog dua huab cua (xws li methane thiab flammable gases) thiab lawv tuaj yeem khaws cia rau sab saud ntawm qhov chaw kaw; qee cov pa roj hnyav dua huab cua (xws li hydrogen sulfide) thiab lawv tuaj yeem pom hauv qab ntawm qhov chaw kaw; muaj lwm tus Qhov tshwj xeeb lub ntiajteb txawj nqus yuav luag hnyav li huab cua (xws li carbon monoxide) thiab lawv tuaj yeem kuaj pom hauv nruab nrab ntawm qhov chaw nyob.
Sampling ntawm qhov siab sib txawv hauv qhov chaw kaw, thiab ua qhov kev tshawb nrhiav tsis tu ncua raws li qhov xwm txheej tiag tiag, peb yuav pom tias cov txiaj ntsig tshawb pom txawv.
Raws li cov chaw taws teeb tswj huab cua nyob rau hauv cheeb tsam, peb tuaj yeem nkag mus rau thaj chaw txwv raws li nws cov ntaub ntawv tshawb nrhiav tsis tu ncua. Ib qhov chaw kaw nkag nkag mus rau hauv lub ntsuas ntsuas los yog qhov chaw soj ntsuam kom txuas ntxiv xa cov txiaj ntsig tshawb pom mus rau cov neeg ua haujlwm peripheral. Cov xwm txheej hauv qhov chaw kaw tau hloov pauv txhua lub sijhawm, txawm tias tsis muaj lub tswb, tom qab xau, tso tawm cov pa phem, lossis hloov pauv hauv qhov chaw.
Detectors yog siv rau qhov chaw nkag.
RAE tsis ntev los no tau tshaj tawm qhov tshiab Confined Space Entry Detector (CSE) uas suav nrog tag nrho cov kev ua haujlwm ntawm lub ntsuas roj ntau. Lub npe Q-RAE Confined Space Entry Detector. Cov cuab yeej tau npaj ua ntej nrog ntau yam cuab yeej yooj yim rau kev sim roj av xav tau los ntawm OSHA 29CFR 1910.146. Ua tsaug rau cov presets no peb tuaj yeem ua haujlwm tau zoo dua thaum kuaj pom cov pa hluav taws xob, hydrogen sulfide, carbon monoxide, thiab oxygen hauv ntau qhov sib txawv.
oxygen concentration
Oxygen qib muab los ntawm OSHA thaj tsam ntawm 19.5 feem pua rau 23.5 feem pua. MultiRAE muaj lub tswb ceeb toom ua ntej rau qhov no, lub cuab yeej yuav xa tawm lub tswb thaum nws qis dua 19.5 feem pua thiab siab dua 23.5 feem pua, thiab tus neeg siv tuaj yeem xaiv qhov teeb tsa no xa tawm lub tswb ua haujlwm nyob rau hauv cov xwm txheej tsis zoo.
nplaim taws
Flammable gas concentrations qis dua 100 feem pua LEL. MultiRAE kuj muaj lub tswb ceeb toom ua ntej. Lub tswb nrov ntawm cov roj hluav taws xob tau teeb tsa ntawm 10 feem pua LEL concentration, tus nqi ceeb toom siab yog teem rau 20 feem pua LEL, thiab tus neeg siv tuaj yeem xaiv qhov xav tau teeb tsa.
cov pa phem
Tus nqi tswb yog pre-set nyob rau hauv qhov raug txwv ntau yam tso cai los ntawm OSHA. MultiRAE preset hydrogen sulfide qis tswb tus nqi yog 10ppm, siab tswb tus nqi yog 20ppm. Lub preset carbon monoxide qis tswb tus nqi yog 35ppm thiab lub tswb nrov yog 200ppm. Cov neeg siv tuaj yeem xaiv cov txiaj ntsig no raws li qhov xav tau tiag tiag. MultiRAE kuj tseem muaj cov sensors rau kev kuaj pom cov pa phem.
